package com.example.tests;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import com.thoughtworks.xstream.XStream;

public class ContactDataGenerator {


	
	public static void main(String[] args) throws IOException {
		if (args.length < 3) {
			System.out.println("Please specify parameters: <amount of test data>, <file>, <format>");
			return;
		}

		int amount = Integer.parseInt(args[0]);
		File file = new File(args[1]);
		String format = args[2];
		
		if (file.exists()) {
			System.out.println("File exists, please remove it manually: " + file);
			return;
		}
		
		List<ContactData> contacts = generateRandomContacts(amount);
		
		if("csv".equals(format)) {
			saveContactsToCsvFile(contacts, file);
		} else if ("xml".equals(format)) {
			saveContactsToXmlFile(contacts, file);
		} else {
			System.out.println("Unknown format " + format);
		}
		return;	
		
	}

	private static void saveContactsToXmlFile(List<ContactData> contacts,
			File file) throws IOException {
		XStream xstream = new XStream();
		xstream.alias("contact", ContactData.class);
		String xml = xstream.toXML(contacts);
		FileWriter writer = new FileWriter(file);
		writer.write(xml);
		writer.close();		
	}
	
	public static List<ContactData> loadContactsFromXmlFile(File file) {
		XStream xstream = new XStream();
		xstream.alias("contact", ContactData.class);
		return (List<ContactData>) xstream.fromXML(file);
	}

	private static void saveContactsToCsvFile(List<ContactData> contacts,
			File file) throws IOException {
		FileWriter writer = new FileWriter(file);
		for (ContactData contact : contacts) {
			writer.write(contact.getFirstname() + "," + contact.getLastname() + "," + contact.getAddress() + "," + contact.getHome()
					+ "," + contact.getMobile() + "," + contact.getWork() + "," + contact.getEmail() + "," + contact.getEmail2()
					+ "," + contact.getBday() + "," + contact.getBmonth() + "," + contact.getByear() + "," + contact.getGroup() 
					+ "," + contact.getAddress2() + "," + contact.getPhone2() + ",!" + "\n");
		}
		writer.close();
		}
	
	
	public static List<ContactData> loadContactsFromCsvFile(File file) throws IOException {
		List<ContactData> list = new ArrayList<ContactData>();
		FileReader reader = new FileReader(file);
		BufferedReader bufferedreader = new BufferedReader(reader);
		String line = bufferedreader.readLine();
		while (line != null) {
			String[] part = line.split(",");
			ContactData contact = new ContactData()
				.withFirstname(part[0])
				.withLastname(part[1])
				.withAddress(part[2])
				.withHome(part[3])
				.withMobile(part[4])
				.withWork(part[5])
				.withEmail(part[6])
				.withEmail2(part[7])
				.withBday(part[8])
				.withBmonth(part[9])
				.withByear(part[10])
				.withGroup(part[11])
				.withAddress2(part[12])
				.withPhone2(part[13]);
			list.add(contact);
			line = bufferedreader.readLine();
		}
		reader.close();
		return list;
	}

	
	
	public static List<ContactData> generateRandomContacts(int amount) {
		List<ContactData> list = new ArrayList<ContactData>();
		for (int i = 0; i < amount; i++) {
			ContactData contact = new ContactData()
			.withFirstname(generateRandomString())
			.withLastname(generateRandomString())
			.withAddress(generateRandomString())
			.withHome(generateRandomString())
			.withMobile(generateRandomString())
			.withWork(generateRandomString())
			.withEmail(generateRandomString())
			.withEmail2(generateRandomString())
			.withBday(generateRandomDay())
			.withBmonth(generateRandomMonth())
			.withByear(generateRandomYear())
			.withGroup("Rob")
			.withAddress2(generateRandomString())
			.withPhone2(generateRandomString());
			list.add(contact);
		}
	return list;
	}
	
	public static String generateRandomString() {
		Random rnd = new Random();
		if (rnd.nextInt(3) == 0) {
			return "";
			}
		else { 
			return "test" + rnd.nextInt();
			}
	}
	
	public static String generateRandomDay() {
		Random rnd = new Random();
		if (rnd.nextInt(3) == 0) {
			return "-";
		}
		else { 
			return "" + (rnd.nextInt(30)+1);
		}
	}
	
	public static String generateRandomYear() {
		Random rnd = new Random();
		if (rnd.nextInt(3) == 0) {
			return "";
		}
		else { 
			return "19" + rnd.nextInt(10) + rnd.nextInt(10);
		}
	}
	
	public static String generateRandomMonth() {
		Random rnd = new Random();
		return "" + (rnd.nextInt(13) + 1);
	}
}
